<?php


namespace App\Study\Facade;


class Facade
{
    private $systemA;
    private $systemB;

    public function __construct()
    {
        $this->systemA = new SystemA;
        $this->systemB = new SystemB;
    }

    public function operation()
    {
        $this->systemA->operationA();
        $this->systemB->operationB();
    }
}
